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Reply-To: solr-user@lucene.apache.org
Subject: Re: Newest docs added
To: solr-user@lucene.apache.org
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From: Shawn Heisey <apache@elyograg.org>
Message-ID: <56D0DA64.7020501@elyograg.org>
Date: Fri, 26 Feb 2016 16:06:12 -0700
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On 2/26/2016 3:53 PM, Toke Eskildsen wrote:
> MarkG <gates.mark@gmail.com> wrote:
>> Is there a way anyone can recommend to identify newly added docs to a Solr
>> index. Ie: I have some new docs. I update the index with the new doc and
>> this happens on a regular basis, say every 4 weeks. I want to be able to
>> distinguish the docs that are new given in a certain number of days, say 10
>> days from the time the index had the new doc added.
> https://lucene.apache.org/solr/4_7_0/solr-core/org/apache/solr/update/processor/TimestampUpdateProcessorFactory.html
> and a 'timestamp:[NOW/DAY-10DAYS TO *]' query?

I didn't know about the timestamp update processor.  That's pretty cool,
and now that I really think about it, would be required for SolrCloud to
operate sanely.

If you're not running SolrCloud, then it can be handled with a config
that's even easier.  You can add a field like the following to your
schema, and make sure that your indexing never includes this field:

   <field name="index_last_mod_internal" type="tdate" indexed="true"
stored="true" docValues="true" default="NOW"/>

That's copied straight out of one of the schemas I'm using.

Thanks,
Shawn